High-beta operation and magnetohydrodynamic activity on the TFTR tokamak

K. McGuire; V. Arunasalam; C. W. Barnes; M. G. Bell; M. Bitter; R. Boivin; N. L. Bretz; R. Budny; C. E. Bush; A. Cavallo; T. K. Chu; S. A. Cohen; P. Colestock; S. L. Davis; D. L. Dimock; H. F. Dylla; P. C. Efthimion; A. B. Ehrhardt; R. J. Fonck; E. Fredrickson; H. P. Furth; G. Gammel; R. J. Goldston; G. Greene; B. Grek; L. R. Grisham; G. Hammett; R. J. Hawryluk; H. W. Hendel; K. W. Hill; E. Hinnov; D. J. Hoffman; J. Hosea; R. B. Howell; H. Hsuan; R. A. Hulse; A. C. Janos; D. Jassby; F. Jobes; D. W. Johnson; L. C. Johnson; R. Kaita; C. Kieras-Phillips; S. J. Kilpatrick; P. H. LaMarche; B. LeBlanc; D. M. Manos; D. K. Mansfield; E. Mazzucato; M. P. McCarthy; M. C. McCune; D. H. McNeill; D. M. Meade; S. S. Medley; D. R. Mikkelsen; D. Monticello; R. Motley; D. Mueller; J. A. Murphy; Y. Nagayama; D. R. Nazakian; E. B. Neischmidt; D. K. Owens; H. Park; W. Park; S. Pitcher; A. T. Ramsey; M. H. Redi; A. L. Roquemore; P. H. Rutherford; G. Schilling; J. Schivell; G. L. Schmidt; S. D. Scott; J. C. Sinnis; J. Stevens; B. C. Stratton; W. Stodiek; E. J. Synakowski; W. M. Tang; G. Taylor; J. R. Timberlake; H. H. Towner; M. Ulrickson; S. Von Goeler; R. Wieland; M. Williams; J. R. Wilson; K. L. Wong; M. Yamada; S. Yoshikawa; K. M. Young; M. C. Zarnstorff; S. J. Zweben

doi:10.1063/1.859544

High-beta operation and magnetohydrodynamic activity on the TFTR tokamak

K. McGuire, V. Arunasalam, C. W. Barnes, M. G. Bell, M. Bitter, R. Boivin, N. L. Bretz, R. Budny, C. E. Bush, A. Cavallo, T. K. Chu, S. A. Cohen, P. Colestock, S. L. Davis, D. L. Dimock, H. F. Dylla, P. C. Efthimion, A. B. Ehrhardt, R. J. Fonck, E. FredricksonH. P. Furth, G. Gammel, R. J. Goldston, G. Greene, B. Grek, L. R. Grisham, G. Hammett, R. J. Hawryluk, H. W. Hendel, K. W. Hill, E. Hinnov, D. J. Hoffman, J. Hosea, R. B. Howell, H. Hsuan, R. A. Hulse, A. C. Janos, D. Jassby, F. Jobes, D. W. Johnson, L. C. Johnson, R. Kaita, C. Kieras-Phillips, S. J. Kilpatrick, P. H. LaMarche, B. LeBlanc, D. M. Manos, D. K. Mansfield, E. Mazzucato, M. P. McCarthy, M. C. McCune, D. H. McNeill, D. M. Meade, S. S. Medley, D. R. Mikkelsen, D. Monticello, R. Motley, D. Mueller, J. A. Murphy, Y. Nagayama, D. R. Nazakian, E. B. Neischmidt, D. K. Owens, H. Park, W. Park, S. Pitcher, A. T. Ramsey, M. H. Redi, A. L. Roquemore, P. H. Rutherford, G. Schilling, J. Schivell, G. L. Schmidt, S. D. Scott, J. C. Sinnis, J. Stevens, B. C. Stratton, W. Stodiek, E. J. Synakowski, W. M. Tang, G. Taylor, J. R. Timberlake, H. H. Towner, M. Ulrickson, S. Von Goeler, R. Wieland, M. Williams, J. R. Wilson, K. L. Wong, M. Yamada, S. Yoshikawa, K. M. Young, M. C. Zarnstorff, S. J. Zweben

Department of Physics

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Abstract

Magnetohydrodynamic (MHD) activity within three zones (core, half-radius, and edge) of TFTR [Plasma Physics and Controlled Nuclear Fusion Research 1986 (IAEA, Vienna, 1987), Vol. 1, p. 51 ] tokamak plasmas are discussed. Near the core of the plasma column, sawteeth are often observed. Two types of sawteeth are studied in detail; one with complete, and the other with incomplete, magnetic reconnection. Their characteristics are determined by the shape of the q profile. Near the half-radius the m/n = 3/2 and 2/1 resistive ballooning modes are found to correlate with a beta collapse. The pressure and the pressure gradient at the mode rational surface are found to play an important role in stability. MHD activity is also studied at the plasma edge during limiter H modes. The edge localized modes (ELM's) are found to have a precursor mode with a frequency between 50-500 kHz and a mode number m/n = 1/0. The mode does not show a ballooning structure. While these instabilities have been studied on many other machines, on TFTR the studies have been extended to high pressure (plasma pressure greater than 4x10⁵ Pa) and low collisionality [v _*ⁱ(a/2)<0.002,v_* ^e(a/2)<0.01].

Original language	English
Pages (from-to)	1287-1290
Number of pages	4
Journal	Physics of Fluids B
Volume	2
Issue number	6
DOIs	https://doi.org/10.1063/1.859544
State	Published - 1990

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McGuire, K., Arunasalam, V., Barnes, C. W., Bell, M. G., Bitter, M., Boivin, R., Bretz, N. L., Budny, R., Bush, C. E., Cavallo, A., Chu, T. K., Cohen, S. A., Colestock, P., Davis, S. L., Dimock, D. L., Dylla, H. F., Efthimion, P. C., Ehrhardt, A. B., Fonck, R. J., ... Zweben, S. J. (1990). High-beta operation and magnetohydrodynamic activity on the TFTR tokamak. Physics of Fluids B, 2(6), 1287-1290. https://doi.org/10.1063/1.859544

@article{ed9924884e5d492b87bda409b638c9d4,

title = "High-beta operation and magnetohydrodynamic activity on the TFTR tokamak",

abstract = "Magnetohydrodynamic (MHD) activity within three zones (core, half-radius, and edge) of TFTR [Plasma Physics and Controlled Nuclear Fusion Research 1986 (IAEA, Vienna, 1987), Vol. 1, p. 51 ] tokamak plasmas are discussed. Near the core of the plasma column, sawteeth are often observed. Two types of sawteeth are studied in detail; one with complete, and the other with incomplete, magnetic reconnection. Their characteristics are determined by the shape of the q profile. Near the half-radius the m/n = 3/2 and 2/1 resistive ballooning modes are found to correlate with a beta collapse. The pressure and the pressure gradient at the mode rational surface are found to play an important role in stability. MHD activity is also studied at the plasma edge during limiter H modes. The edge localized modes (ELM's) are found to have a precursor mode with a frequency between 50-500 kHz and a mode number m/n = 1/0. The mode does not show a ballooning structure. While these instabilities have been studied on many other machines, on TFTR the studies have been extended to high pressure (plasma pressure greater than 4x105 Pa) and low collisionality [v *i(a/2)<0.002,v* e(a/2)<0.01].",

author = "K. McGuire and V. Arunasalam and Barnes, {C. W.} and Bell, {M. G.} and M. Bitter and R. Boivin and Bretz, {N. L.} and R. Budny and Bush, {C. E.} and A. Cavallo and Chu, {T. K.} and Cohen, {S. A.} and P. Colestock and Davis, {S. L.} and Dimock, {D. L.} and Dylla, {H. F.} and Efthimion, {P. C.} and Ehrhardt, {A. B.} and Fonck, {R. J.} and E. Fredrickson and Furth, {H. P.} and G. Gammel and Goldston, {R. J.} and G. Greene and B. Grek and Grisham, {L. R.} and G. Hammett and Hawryluk, {R. J.} and Hendel, {H. W.} and Hill, {K. W.} and E. Hinnov and Hoffman, {D. J.} and J. Hosea and Howell, {R. B.} and H. Hsuan and Hulse, {R. A.} and Janos, {A. C.} and D. Jassby and F. Jobes and Johnson, {D. W.} and Johnson, {L. C.} and R. Kaita and C. Kieras-Phillips and Kilpatrick, {S. J.} and LaMarche, {P. H.} and B. LeBlanc and Manos, {D. M.} and Mansfield, {D. K.} and E. Mazzucato and McCarthy, {M. P.} and McCune, {M. C.} and McNeill, {D. H.} and Meade, {D. M.} and Medley, {S. S.} and Mikkelsen, {D. R.} and D. Monticello and R. Motley and D. Mueller and Murphy, {J. A.} and Y. Nagayama and Nazakian, {D. R.} and Neischmidt, {E. B.} and Owens, {D. K.} and H. Park and W. Park and S. Pitcher and Ramsey, {A. T.} and Redi, {M. H.} and Roquemore, {A. L.} and Rutherford, {P. H.} and G. Schilling and J. Schivell and Schmidt, {G. L.} and Scott, {S. D.} and Sinnis, {J. C.} and J. Stevens and Stratton, {B. C.} and W. Stodiek and Synakowski, {E. J.} and Tang, {W. M.} and G. Taylor and Timberlake, {J. R.} and Towner, {H. H.} and M. Ulrickson and {Von Goeler}, S. and R. Wieland and M. Williams and Wilson, {J. R.} and Wong, {K. L.} and M. Yamada and S. Yoshikawa and Young, {K. M.} and Zarnstorff, {M. C.} and Zweben, {S. J.}",

year = "1990",

doi = "10.1063/1.859544",

language = "English",

volume = "2",

pages = "1287--1290",

number = "6",

}

McGuire, K, Arunasalam, V, Barnes, CW, Bell, MG, Bitter, M, Boivin, R, Bretz, NL, Budny, R, Bush, CE, Cavallo, A, Chu, TK, Cohen, SA, Colestock, P, Davis, SL, Dimock, DL, Dylla, HF, Efthimion, PC, Ehrhardt, AB, Fonck, RJ, Fredrickson, E, Furth, HP, Gammel, G, Goldston, RJ, Greene, G, Grek, B, Grisham, LR, Hammett, G, Hawryluk, RJ, Hendel, HW, Hill, KW, Hinnov, E, Hoffman, DJ, Hosea, J, Howell, RB, Hsuan, H, Hulse, RA, Janos, AC, Jassby, D, Jobes, F, Johnson, DW, Johnson, LC, Kaita, R, Kieras-Phillips, C, Kilpatrick, SJ, LaMarche, PH, LeBlanc, B, Manos, DM, Mansfield, DK, Mazzucato, E, McCarthy, MP, McCune, MC, McNeill, DH, Meade, DM, Medley, SS, Mikkelsen, DR, Monticello, D, Motley, R, Mueller, D, Murphy, JA, Nagayama, Y, Nazakian, DR, Neischmidt, EB, Owens, DK, Park, H, Park, W, Pitcher, S, Ramsey, AT, Redi, MH, Roquemore, AL, Rutherford, PH, Schilling, G, Schivell, J, Schmidt, GL, Scott, SD, Sinnis, JC, Stevens, J, Stratton, BC, Stodiek, W, Synakowski, EJ, Tang, WM, Taylor, G, Timberlake, JR, Towner, HH, Ulrickson, M, Von Goeler, S, Wieland, R, Williams, M, Wilson, JR, Wong, KL, Yamada, M, Yoshikawa, S, Young, KM, Zarnstorff, MC & Zweben, SJ 1990, 'High-beta operation and magnetohydrodynamic activity on the TFTR tokamak', Physics of Fluids B, vol. 2, no. 6, pp. 1287-1290. https://doi.org/10.1063/1.859544

TY - JOUR

T1 - High-beta operation and magnetohydrodynamic activity on the TFTR tokamak

AU - McGuire, K.

AU - Arunasalam, V.

AU - Barnes, C. W.

AU - Bell, M. G.

AU - Bitter, M.

AU - Boivin, R.

AU - Bretz, N. L.

AU - Budny, R.

AU - Bush, C. E.

AU - Cavallo, A.

AU - Chu, T. K.

AU - Cohen, S. A.

AU - Colestock, P.

AU - Davis, S. L.

AU - Dimock, D. L.

AU - Dylla, H. F.

AU - Efthimion, P. C.

AU - Ehrhardt, A. B.

AU - Fonck, R. J.

AU - Fredrickson, E.

AU - Furth, H. P.

AU - Gammel, G.

AU - Goldston, R. J.

AU - Greene, G.

AU - Grek, B.

AU - Grisham, L. R.

AU - Hammett, G.

AU - Hawryluk, R. J.

AU - Hendel, H. W.

AU - Hill, K. W.

AU - Hinnov, E.

AU - Hoffman, D. J.

AU - Hosea, J.

AU - Howell, R. B.

AU - Hsuan, H.

AU - Hulse, R. A.

AU - Janos, A. C.

AU - Jassby, D.

AU - Jobes, F.

AU - Johnson, D. W.

AU - Johnson, L. C.

AU - Kaita, R.

AU - Kieras-Phillips, C.

AU - Kilpatrick, S. J.

AU - LaMarche, P. H.

AU - LeBlanc, B.

AU - Manos, D. M.

AU - Mansfield, D. K.

AU - Mazzucato, E.

AU - McCarthy, M. P.

AU - McCune, M. C.

AU - McNeill, D. H.

AU - Meade, D. M.

AU - Medley, S. S.

AU - Mikkelsen, D. R.

AU - Monticello, D.

AU - Motley, R.

AU - Mueller, D.

AU - Murphy, J. A.

AU - Nagayama, Y.

AU - Nazakian, D. R.

AU - Neischmidt, E. B.

AU - Owens, D. K.

AU - Park, H.

AU - Park, W.

AU - Pitcher, S.

AU - Ramsey, A. T.

AU - Redi, M. H.

AU - Roquemore, A. L.

AU - Rutherford, P. H.

AU - Schilling, G.

AU - Schivell, J.

AU - Schmidt, G. L.

AU - Scott, S. D.

AU - Sinnis, J. C.

AU - Stevens, J.

AU - Stratton, B. C.

AU - Stodiek, W.

AU - Synakowski, E. J.

AU - Tang, W. M.

AU - Taylor, G.

AU - Timberlake, J. R.

AU - Towner, H. H.

AU - Ulrickson, M.

AU - Von Goeler, S.

AU - Wieland, R.

AU - Williams, M.

AU - Wilson, J. R.

AU - Wong, K. L.

AU - Yamada, M.

AU - Yoshikawa, S.

AU - Young, K. M.

AU - Zarnstorff, M. C.

AU - Zweben, S. J.

PY - 1990

Y1 - 1990

N2 - Magnetohydrodynamic (MHD) activity within three zones (core, half-radius, and edge) of TFTR [Plasma Physics and Controlled Nuclear Fusion Research 1986 (IAEA, Vienna, 1987), Vol. 1, p. 51 ] tokamak plasmas are discussed. Near the core of the plasma column, sawteeth are often observed. Two types of sawteeth are studied in detail; one with complete, and the other with incomplete, magnetic reconnection. Their characteristics are determined by the shape of the q profile. Near the half-radius the m/n = 3/2 and 2/1 resistive ballooning modes are found to correlate with a beta collapse. The pressure and the pressure gradient at the mode rational surface are found to play an important role in stability. MHD activity is also studied at the plasma edge during limiter H modes. The edge localized modes (ELM's) are found to have a precursor mode with a frequency between 50-500 kHz and a mode number m/n = 1/0. The mode does not show a ballooning structure. While these instabilities have been studied on many other machines, on TFTR the studies have been extended to high pressure (plasma pressure greater than 4x105 Pa) and low collisionality [v *i(a/2)<0.002,v* e(a/2)<0.01].

AB - Magnetohydrodynamic (MHD) activity within three zones (core, half-radius, and edge) of TFTR [Plasma Physics and Controlled Nuclear Fusion Research 1986 (IAEA, Vienna, 1987), Vol. 1, p. 51 ] tokamak plasmas are discussed. Near the core of the plasma column, sawteeth are often observed. Two types of sawteeth are studied in detail; one with complete, and the other with incomplete, magnetic reconnection. Their characteristics are determined by the shape of the q profile. Near the half-radius the m/n = 3/2 and 2/1 resistive ballooning modes are found to correlate with a beta collapse. The pressure and the pressure gradient at the mode rational surface are found to play an important role in stability. MHD activity is also studied at the plasma edge during limiter H modes. The edge localized modes (ELM's) are found to have a precursor mode with a frequency between 50-500 kHz and a mode number m/n = 1/0. The mode does not show a ballooning structure. While these instabilities have been studied on many other machines, on TFTR the studies have been extended to high pressure (plasma pressure greater than 4x105 Pa) and low collisionality [v *i(a/2)<0.002,v* e(a/2)<0.01].

UR - http://www.scopus.com/inward/record.url?scp=0342935792&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0342935792&partnerID=8YFLogxK

U2 - 10.1063/1.859544

DO - 10.1063/1.859544

M3 - Article

AN - SCOPUS:0342935792

SN - 0899-8221

VL - 2

SP - 1287

EP - 1290

JO - Physics of Fluids B

JF - Physics of Fluids B

IS - 6

ER -

High-beta operation and magnetohydrodynamic activity on the TFTR tokamak

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